The Morgan V2 Endurance Pro boxing gloves 12 oz or 16 oz size covers most adult sizes.As boxing gloves weight size increases so does the overall glove size.The size chart below is a guide only as boxing gloves sizing often depends on the activity and what you are trying to achieve.If you want more protection or fitness endurance then you may want to use a larger size glove.When you want more speed and not so much protection then you may favour a smaller size glove.